Description
The unserialize function in PHP 5.3.0 and earlier allows context-dependent attackers to cause a denial of service (resource consumption) via a deeply nested serialized variable, as demonstrated by a string beginning with a:1: followed by many {a:1: sequences.
Published: 2009-12-24
Score: 5.0 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2009-4385 The unserialize function in PHP 5.3.0 and earlier allows context-dependent attackers to cause a denial of service (resource consumption) via a deeply nested serialized variable, as demonstrated by a string beginning with a:1: followed by many {a:1: sequences.
History

Wed, 28 May 2025 14:45:00 +0000

Type Values Removed Values Added
References

Thu, 22 May 2025 04:30:00 +0000


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-09-17T02:36:19.215Z

Reserved: 2009-12-24T00:00:00.000Z

Link: CVE-2009-4418

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2009-12-24T17:30:00.233

Modified: 2026-04-23T00:35:47.467

Link: CVE-2009-4418

cve-icon Redhat

Severity : Low

Publid Date: 2009-11-05T00:00:00Z

Links: CVE-2009-4418 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses